AP ICET 10 Sep 2020 Shift 1 Paper

Note:
In a certain code, nth letter of the English alphabet is called as rth. where n+12 =26m+r such that m and r are integers and 0 ≤ r ≤ 25 and when r=0.
rth letter is treated as ‘z ’. For example the 5th letter E is coded as 17th letter Q. N as Z and R is coded as D. The reverse process is used for decoding.
Use these to answer questions